Implement WebContentsViewChildFrame::TakeFocus.

content/browser/web_contents/web_contents_impl.cc

Index: content/browser/web_contents/web_contents_impl.cc
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index b22bfdaa29fea8982f715fce1d99644b77d2ee72..2ffba63b66a28db1fc297382c5319be99d307398 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -4674,6 +4674,14 @@ void WebContentsImpl::SetAsFocusedWebContentsIfNecessary() {
   // and focus this contents to activate it.
   if (old_contents)
     old_contents->GetMainFrame()->GetRenderWidgetHost()->SetPageFocus(false);
+
+  // Make sure the outer web contents knows our frame is focused. Otherwise, the
+  // outer renderer could have the element before or after the frame element
+  // focused which would return early without actually advancing focus.
+  if (GetRenderManager()->GetProxyToOuterDelegate()) {

[alexmos, 2016/11/28 23:52:24]

nit: { not necessary

[avallee, 2016/12/09 21:16:51]

Done.

+    GetRenderManager()->GetProxyToOuterDelegate()->SetFocusedFrame();
+  }
+
   GetMainFrame()->GetRenderWidgetHost()->SetPageFocus(true);
   GetOutermostWebContents()->node_->SetFocusedWebContents(this);
 }